Dichloromethane Impregnated Test Machine

Dichloromethane Impregnated Test Machine measures the impregnation test of dichloromethane on plastic pipe, fittings and sheets. It is commonly used in pipe and fittings, sheet production plants, construction quality inspection institute and research branch.

Standard:

GB/T13526:test method for dichloromethane impregnation of PVC-U

ISO/DIS9852:test method for dichloromethane impregnation of PVC-U

Main products:

Constant temperature water bath, stainless steel container, sample fine mesh filter, temperature control and timing system and so on.

Technical parameters:

1. Stainless steel container specification: diameter 350mm, height 280mm

2. Dichloromethane constant temperature:20±0.5℃

3. Instrument control temperature range:10-50℃

4. Instrument control temperature precision:±0.2℃

5. Instrument display precision:0.1℃

6. Timer range:0-99min

7. Timer precision:1s

Sample standard: the sample intercept length should be at least 100mm

Sample method:

1. The sample should be immersed in a depth of least 30mm.

2. The thickness of the water seal layer is about 20mm.

3. The sample constant temperature time is 20min, the surface is severely damaged after being dried for 15 minutes.(sample burst skin, cracked, scarred, etc.)

— surface damaged   d. S

— slight change       c. M

— no change or slight change     b. L

— surface severely damaged(sample3.burst skin, cracked, scarred, etc.)

Dichloromethane impregnation test is an important test of PVC-U pipes. It is used to characterize the degree of plasticization degree and homogeneity of pipes.

The plasticization degree of pipes will directly effect the long-term hydrostatic performance and has a directly impact on the service life of pipes. Different standard has different testing requirements of pipes.

Reagent:dichloromethane, AR

Devices:No.800 sandpaper    constant temperature water tank    timer    stainless steel container

Sample:cut the at least 100mm pipe section from the pipe material, under the condition that the material is not heated as far as possible, carefully using the right-angle turning tool to cut sample fracture surface, then using No.800 sandpaper to gently polish, make the fracture surface smooth and flat.

Test steps:pour dichloromethane into the container, the sample should be immersed in a depth of least 30mm. Distilled water is slowly added to the container to form a 20mm thick water seal on dichloromethane.

Pour the container into the constant temperature water container, adjust the temperature, when the temperature of dichloromethane reaches 20±0.5℃, the sample is immersed in the container on the grid or suspended in dichloromethane. The immersed depth of the sample should not be less than 30mm. The fracture surface of the sample should be immersed in the solution.

The sample is immersed for 20mm at constant temperature. Take the sample out from the container and make it dry 15min. The inner, outer and fracture surfaces of the sample are inspected with naked eyes. Using tape measure and vernier caliper to test inner and outer surfaces and the damaged length of cross section. Record all change conditions.

Results:The quality change of sample surface was assessed by the following grades: a. N